Warp stop-motion for looms.



J. NORTHROP.

WARP STOP MGTION FOR LOOMS. APPLICATION FILED DEC. 9, 1910.

1,045,170. Patented Nov. 26, 1912.

3 SHEETS-SHEET 1.

Inventor 5W QM u oncw 11522 6717 0 7 My, mm, b @m v J. NORTHROP. WARPSTOP MOTION FOR LOOMS.

1,045, 1 70' APPLICATION FILED D110. 9, 1910. I Nov. 26

3 BHBETHIBET 8.

ll/drwsses:

I 720 7123071 :fonaafVonf/zrgp J. NORTHRO P. 'WABP STOP MOTION FORLOOMS. I APPLICATION 11.51) no. 9. 1910.

1 045,170. Patented Nov. 26, 1912.

3 SHEETSSHEET 3.

ZZ/L'Zn eases: Inventor.-

(Z 'W', @nas MTZ/ZTOZV m. N 'w/ UNITED STi TES PAltl j-INT OFFICE.

JONAS NORTHROP, OF HOPEDALE, MASSACHUSETTS. ASSIGNOR. BY MESNE ASSIGN-MENTS. TO DRAPER COMPANY, A CORPORATION OF MAINE.

Specification of Letters Patent.

Patented Nov. 26, 1912.

Application filed December 9. 1910. Serial No. 596,407.

T 0 all whom it may concern:

Be it known that I, Jonas Non'rnnor, a

citizen of the United States, residing at I'Iopedale, in the county of\Vorccster and State of Massachusetts, have invented an Improvement inWarp Stop-Motions for Looms, of which the following description, inconnection with the accompanying drawings, is a specification, likeletters on the drawings representing like parts.

The invention to be hereinafter described relates to looms, and moreparticularly to the. warp stop motion which is utilized to bring theloom to rest upon the occurrence of an objectionable warp fault.

In a. prior application, Serial No. 576,796, filed August 12, 1910,there was shown, described and claimed a warp stop motion, wherein therelation of parts was such that not only was the shuttle caused tooccupy the same box each time the loom was stopped owing to a warpfault; but. when first operating the loom after putting in a new set ofwarps, .the warp stop motion could be readily made inoperative to enablethe loom to run for a time without stopping owing to a war fault. Thisenables the loom tender" to piece up the many broken ends and get thewarp in proper condition be fore commencing to weave commercially, andto do this without constantly having the loom stopped. In the said priorapplication, also, the relation of the feeler and its actuator was suchas to permit each to be independently moved. so that should the loom bestopped by a. warp fault. the operativc could move the fecler by hand.clamp the dropped detector, and by running his hand over the loosedetectors, could at once locate the clamped detector and. perforce, thebroken or loose warp thread.

The aims and purposes of the present invention are closely related inthese respects to the invention of the said prior application; and, inaddition, seek to simplify the operation and construction, all of which,and other objects of the invention will best be made clear from thefollowing description and accompanying drawings of one form orembodiment of the invention, which, in its true scope. is defined by theclaims.

In the drawings :Figure 1 is a central vertical section from front torear of a loom 1 provided with one form of the present invention. onlyso much of the loom structure being shown as is necessary to disclosethe relation of parts: Fig. 2 is an enlarged top or plan view of oneside of the loom, showing parts of the warp stop motion and-connectionwith the feeler. and drop wires; Fig. 3 is a detail showing some of theparts as they appear related when the loom is to be stopped by a warpfault; Fig. 4 a transverse sectional and enlarged view on the line 4% ofFig. 1, some of the parts being broken away to more clearly show theconstruction; Fig. 5 is a section on the line 5-5 of Fig. 4, showing thedetectors. the feeler. the center support, and other details; and Fig. 6is a detail sectional view on line (36 Fig. 4.

The loom frame 1. the lay 2, the crank shaft 3, the connection 4 betweenthe crank shaft and lay, the bottom or cam shaft 5, the breast beam 6.the bracket 7 having the slot 8 and holding notch 9 for a shipper handle10, may be of usual or any preferred construction suitable to thepurposes intended. Pivotally connected at 11 to the loom frame is aknock-off lever 19. one end whereof lies in front of the shipper handle10, Figs. 1 and '2. and the other end is connectcd to a knockoffactuator. the cou truw tion being such that upon movement of theactuator in a manner hereinafter described, the knockoff-lever will bemoved clocxwise, viewing Fig. 1, and release the shipper handie 10 fromits holding notch. whereupon the loom will be brought to rest.

In the present form of the invention. the actuator for the knockotl'lever 12 comprises a link 13 connected to the lever 12. at 14, and atits opposite end joined at 13 to the lower end of a lever 16. pivoml at17 to a suitable bracket or vsupport. At its upper end the lever 16carries a dagger. which, upon a warp fault, is adapted to be actuated bythe lay to move the knock-off lever, as will be evident.

In the construction shown, the lever 16 carries at its upper portion astud or pin 18 upon which is mounted the rocking sleeve 19 havingoperatively connec l thereto the dagger .20 and the finger 21. ceruredto the lay is a bunter 22, which, on fine backward movement of the lay,will engage the end of extending beneath .GB 1

the dagger 20, provided such end he in the path of the hunter, acondition that occurs when a warp fault is present, as will hereinafterappear. The bunter 22 may be provided with a guard plate 23, to reventthe operative getting his hand acci entally between the bunter anddagger, but this may be omitted, if desired.

The under surface of the finger 21, Fig. 3, is provided with a. bearingportion 24 which rests upon a lifter 25, said litter in the present formof the invention comprising a stud, projection, or roll mounted on therocking arm 26. A spring 27 connected to the finger 21 at 28 and to thebracket 29 at 30 normally forces the rear portion of the finger downwardand upon the lifter 25.

The rocking arm 26 is connected to a rocking wiper or member 31pivotally mounted at 32 upon the bracket 29 secured to the loom frame.The rockin wiper or member 31 has at each side of its pivotal connectionwith the bracket 29, the cam or incline portions 33, which co -act withan actuator 34, so mounted and operated that it will upon one upwardmovement engage one of said cam portions 33 and turn the wiper 31 in onedirection, and on the next upward movement will engage the other camportion 33 and turn the wiper in the opposite direction, see Fig. 1.

From the construction thus far described, it will be apparent that whenthe rocking actuator 31 is rocked first in one and then in the oppositedirection, the lifter 25 will pass from the bearing portion 24 of thefinger 21 and engage either of the end cam portions 35 on the finger,perniittin the finger to respond to the demands of the spring 27 and,perforce, rock the sleeve 19 with consequent raising of the dagger 20 toremove it from the path of the hunter 22. When the parts operate in themanner stated, and the rocking actuator 31 is not prevented from themovements described, the loom will continue to run, but should therocking wiper 31 be prevented from movement, a condition that will occurwhen a warp fault is present, then the lifter 25 will remain in contactwith the bearing surface 24 of the finger and hold the dagger 20- in thepath of movement of the hunter 22 on the lay, with the result that assaid lay moves back, the hunter will contact with the dagger rock thelever 16 clock-wise, and correspondingl move the knock off lever 12 todisengage the shipper handle 10 from its holding notch, thereby stoppingthe loom.

It is desirable at times to run the loom with the warp stop motioninoperative. the present form of the i the actuator for tho prises anarm 34- liavmp: a foot portion 3o a bearing portion on the ever 37. saidlever in the present forinpf the invention preferably comprising theweft fork actuating lever, the end portion 38 of which is incotiperative relation with the cam 39 on the cam shaft 5, as will bereadliy understood by those skilled in the art. I

The foot portion 36 is maintained in yielding engagement with thebearing portion of the lever 37 by means of a spring 40, one seat 41 onthe actuator 34, while the other end thereof engages a seat 42 on thelever 37, the construction being such that said actuator 34, whilenormally maintained by the spring in operative relation with the rockingWiper 31, may be readily moved by the hands of the operative from fullto dotted line position, Fig. 1, with the end of the actuator 34 infront ofthe guide 43 secured to the bracket 29. In this dotted lineposition of the parts, it will be noted, Fig. 1, that while the hunterand dagger are maintained in position not to cause stoppage of the loom,the actuator 34 will moved up and down in front of the guide 43 withouteffecting movement of the rocking wiper 31.

Connected to the rocking wiper 31, as at 44. is an arm 45 adjust-ablyconnected at 46 to a rod 47 which is itself jointed at 48, Figs. 1 and2, to a crank arm 49 secured to t e rocking feeler rod 50, theconstruction being such that upon rocking movement of rod 50 will besimirocked, as will also be the feeler 51 connected thereto, as willpresently appear.

Adjustablv connected to the loom sides y means 0 bolts 52, Fig. 4, arethebrackets 53, having bearings 54 attheir upper portions for therocking feeler rod 50, Fig. 4. Secured to the feeler rod 50. preferablyat either end thereof, is the depending arm 55 and between the lowerextremities of the arms 55 is the feeler 51 which is adapted tocooperate with the detectors 56 in a manner that will presently a pear.The detectors 56 may be of any usu. character and herein they are formedas flat pieces of metal having slots 57 to engage the guide bars 58,said detectors having perforations at 59 for the passage of warpthreads.

It will be noted from Fig. 5 that the feeler rod 51 is disposed betweenthe detectors 56, said detectors ing arranged in two rows, as indicatedby Figs. 4 and 5, the construction being such that the feeler rod 51'serves. to separate the two series of detectors, one series or row ofdetectors being disposed between the feeler rod and the side bar 60 andthe other row of (lQiGCt-OIfSQ-bfilllg disposed between the feeler rod51 and the opposite side bar 60, as clearly shown by Fig. 5. The warpthreads pass from the bars 60 each through an eye 59 of one of thedetectors, said warp threads also passing above the teeter rod 50. Sincethe feeler rod 50 is formed ooircircular in cross-section, itl will he nted that upon each rocking move men! thereof, the warp threads will beagi l tatrzl or raised. thereby pr venting that fre quent cause ofannoyance in warp stop motions. to wit. stopping of the loom by aslightly slack warp thread.

Depending from the side bars 60 Which extend between the brackets 53 arethe arms 61, Figs. 1 and 5, and between the lower extremities of thesearms 61 extend the side bars 62, the inner surfaces of which may beserrated, if desired, and as indicated in Figs. 4 and 5. The teeler 51,as hereinbefore noted, comprises a strip, preferably of light materialsuch as sheet metal, extending between the arms which depend .from thefeeler rod 50, and in order to support the central portion of thisfeeler 51. there is a bridge-piece 63, Fig. 5, preferably secured to theside bars 62, and serving as a rest for the central portion of thefeeler 51 as the same moves between the side bars 62, as will be evidentto those skilled in the art. It desirable, the feeler 51 may be furthersupported by additional bridge pieces 64, Fig. 6, secured to the sidebars 62 at intermediate points, but these are not always necessary. Itis desirable to additionally support the detector guide rods, which areusually light and easily bent or deflected, and to this end the presentinvention contemplates a novel form of center support supplemental tothe end supports by means of the bracket to which the guide rods aresecured. In the present form of this feature of the invention, thecenter; support comprises an upper arch piece 65 having slots for thepassage of the rods and seats 66. Fig. 5. resting on the upper side bars(10. The lower leg porti ns ('37 extend slightly below the upper sidebars 00 and are each proyided with a slot 13. Fig. 1'. which are adaptedto be engaged by a transverse rod 9 having hooked portions it) to engageand interlock with pins 71 on the legs 67, the construction being suchthat when the arch piece 5 is put in position and the slotted legportions are engaged by the rod 69 below the side pieces (30. the hookedportions 70 ot the transverse rod may be turned to engage the pins 71and lock the parts securely in position without the use of bolts.screws. or other form of fastening devices which are ditiicult if notimpossible to manipulate while the warp is in the loom. The transverserod 69 may have a lower bearing support 72 to engage beneath and supportthe feeler rod 50, and upwardly extending lug portions 73 on thetransverse rod 69 may engage beneath the guide rods 59.

From the onstruction described, it willl be noted that the teeter 51 isgiven an ampli- I tudiof mmement to cause it to pass beyond j thelti'i-l edges of the lower side bars 62 bei tore the iser 25 passes fromthe bearing surface of the finger "21. the effect being that not onlywill the loom be stopped when a dctecton is in lower position and itsedge portions are engaged by the teeter and one. of the lower side bars6'2, but. such stopping of the loom will occur even though the detectorshould turn to present its flat sides to the teeter and side bar.

lt will be noted that the feeler rod 0 acts upon the warp threads ateach rocking movement to lift said threads and prevent unnecessary loomstoppage; and since the feeler rod and feeler are assembled in therelation noted with the rod above the feeler, the detectors and adjacentparts may be placed near the rear of the loom or closer to the warpbeam; and that the parts including the rocking wiper. actuator, andassociateo elements are at the side of. the loom and not below the warpso that they are readily accessible.

\Vhat is claimed is:

1. in a warp stop motion for looms, the combination of a series of warpdetectors, a teeler. means for moving the teeler to cause it to engageand be stopped by a detector in abnormal position, a lever. a fingeranddagger pivotally mounted on said lcvcr. said finger having a bearingsurface. a rocking litter connected to said means for acting on thesurface of said finger and to pass from said surface to permit thedaggcr to move out of operative position during movement of the feelerand to remain in contact with said surface and hold the dagger inoperative position when the teeler movement is stopped upon'theoccurrence of a warp fault.

in a warp stop motion for looms, the combination of arp detectors, aleeler, a rocking member connected to and for moving the t'eclcr. meanstor actuating the rock iug member. a lever. a finger and dagger mountedon said lever, a litter movable with the rocking member beneath the saidfinger to cause the dagger to be moved out of operative position duringfeeler movement and to remain in operative position when the tceler isarrested by a detector. and means normally acting to move the fingertoward the rocking lifter.

il. in a warp stop motion for looms. the combination of a series of warpdetectors, a tcclcr. devices coiiperating with the feeler to cause it toengage and be stopped by a warp detector in abnormal position. anactuator for said devices movable into and out of oi wrative relationtherewith, and means independent ol said devices for engaging andholding the actuator in inoperative relation to said devices.

'1. ln :1 warp stop motion for looms. the combination of a eries of Warpdetectors, a feelcr, a rocking member connected to and combination 0 foroperating the feeler, a lever mounted in rear of the lay, a finger anddagger pivotally mounted on the lever, and stop devices connected tosaid lever, said finger having a bearing surface and a cam portion ateach end of said surface, a rockmg lifter movable over said bearingsurface and said cam portions, and means on the lay to engage the daggerwhen the ro king lifter fails to move from the hearing surface of thefinger.

5. In a war stop motion for looms, the a series of warp detectorsarranged in rows, a feeler rod non-circular in cross-section disposedbetween the rows of detectors and serving to support the warp threadsbetween the'rows of detectors, a feeler connected to said rod, and meansfor oscillating said rod and feeler, and cause the warp threads to belifted at each de tecting action of the feeler.

6. In a warp stop motion for looms, the combination of plural rows ofwarp detectors, a support for the warp threads between said rows ofdetectors, and means for causing said support to periodically raise thewarp threads to prevent loom stop age due to negligible slackness in awarp tli read.

In a warp stop motion for looms, the combination of a series of warpdetectors, guide rods on which said detectors are mounted, means forsupporting the end portions of said guide rods, a support for the guiderods intermediate the ends thereof, said support comprising twointerengaging members, and a catch for detachably holding the parts insupporting position.

8. In a warp stop motion for looms. a frame,.extending transversely ofthe loom and comprising side bars, a series of warp detectors disposedbetween the side bars, guide rods for said detectors, an intermediatesupport for said guide rods resting on said side bars, and a clamp forholding the intermediate support in position.

9. In a warp stop motion for frame extending transversely of the loomand comprising side bars. a series of warp detectors disposed betweenthe side bars, guide rods for said detectors, an intermediate supportfor said guide rods comprising an upper member rcstin on the side bars,a lower member beneath the side bars, and a catch for detachablyconnecting the upper and lower members.

10. In a war) stop motion for looms, a series of warp detectors, 1feeler, a rocking member for oscillating the teeter, a rod connectingthe fecler and rocking member, an actuator disconnected from the rockingmember, and means permitting the actuator to engage the rocking'memherat either side of its rocking fulcrum.

11. In a'war) stop motion for series of warp detectors,

looms, a

looms, a feeler, a rocking i l i i i l l I l i l I i I l l i l t lpivotally member for oscillating the i'eeler, a rod connecting theteeter and rocking member. an actuator iilisconnccted from the rockingmember, means permitting the actuator to engage the rocking member ateither side of its rocking fulcrum, and means independent of the rockingmember to hold the actuator out of operative relation with respect tothe rocking memben,

12. In a warp stop motion for looms, the combination of a series of warpdetectors, a t'eeler, means including a rocking member and an actuatortherefor disconnected therewith for causing the feeler to engage and bestopped by an abnormally positioned warp detector, a dagger adapted tobe moved by the lay on its rearward movement, a finger for controllingthe position of the dagger, and devices between the said means andfinger to hold the dagger in position to be moved by the lay until afterthe feeler has passed the transverse vertical plane extending throughthewarp detectors.

13. In a war stop motion for looms, a series of warp diitectors, afeeler, a rocking member for actuating the feeler, an actuator for therocking member disconnected therefrom and movable into contacttherewith,a pivotally mounted lever, a dagger pivoted on said lever, the lavhaving a hunter, and means connected to the rocking member for causingthe dagger to he engaged by the hunter and the said lever to be turnedon its pivot to stop the loom when the feelcr is stopped by a detector.

14, In a warp stop motion for looms, the combination of a series of warpdetectors, a feeler, a rocking member, a rod connecting the feeler androcking member. an actuator for the rocking member disconnectedtherefrom, and a fixed guide adapted to direct the movement of theactuator into inoperative relation with the rocking member.

15. In a warp stop motion for iooms. a pivoted lever adapted by itsmovement to stop thc loom, a dagger movably mounted on said lever. a layhaving a hunter, and a rocking member having a part. to move the daggerinto position to be struck by the hunter, said dagger having connectedcam portions to permit movement of the dagger into inoperative positionwhen said part is withdrawn by movement of the rocking member.

16. In a warp stop motion for looms, the combination of a series of warpdetectors,

:1 t'eeler. a rocking member. a rod connected to the rocking member andtecler, and an actuator for the rocking member adapted to alternatelyengage the rocking member at opposite sides of its rocking fulcrum.

In a warp stop motion for looms, the combination of a series of warpdetectors, a feeler, a rocking member, a rod connected to the rockingmember and 'feeler, an actuator i'm in King immflwr :umpu-(l toaltername to this specification, in the presence of I1iltQi ViD;1':1 f8the I'OPiQlllgIHPlIkiMTHi1 opposlte two subscribing witnesses.

i i 5 sides 01 its rocking Ink-i 1" and a guide ad- II JOXAS NORTHROPjacent the inching member to be engaged by 5 the acumtor to maintain itin inoperative relation with said rocking member.

In vesiimony whereof, I haw signed my \Vitnesses \VENDELL \VILLIAMS,BERTHA I. SNARE.

Copies of this patent may be obtained for five cents each by addressingthe Commissioner of Patents. Washington, D. C.

